Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c9265f9d8af9e3…

MALICIOUS

PDF

117.6 KB Created: 2021-07-26 14:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9ed157bb10aaf9e0ffa2741853acb81f SHA-1: 81a61a601cac2ec265aab3a451eed38bc6f8466c SHA-256: 96c9265f9d8af9e3fe2bff9f060f5f51c736b4fefba7a54b960a40b5eee81ad9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous external URIs pointing to potentially compromised WordPress sites. The document body is heavily obfuscated and appears to be generated content rather than user-readable text, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/98d48f0a9ec28ca9c5de977cd67da36f/gaguw.pdf In PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/4ao8gsccs09ur4p6vaug05djfn/gakimobeneguvetawivudugol.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b3557b6e3---pogedavun.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/1871379581.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607975681390f---futagomunadeno.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/dj4od1b2rh1msclgtocdi28k96/dumeninolugoxewupit.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6c350dbfc---sogifetatosu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba673de13ec---10732819960.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/e5c149a49792763d0e48625780629900/70069349495.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/43001980617.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/d0947c27409ffb5a986a2347b1545e41/49352815270.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/korajaberasetuwazakaxiri.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160874b6aac37f---vitonuruzexidavibagu.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/92a70bbf9d3a7ea75b055e202a976322/tuvorimedid.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021621642467337.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/51636784839.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/49027351995.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/d880b7a55db5d1e1f8d5491489463e6f/24591085708.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8933dfcd2---migigokuxirijam.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/pozotezu.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/59700013919.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1e56efc34---liveginuxajedulimi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=12+times+table+up+to+300PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18480 10816 bytes
SHA-256: a11f290194d5f27cec190d578ae29cffae6d696fb73df79221574cd1034d9e55
font_02_sfnt_off00019d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D53 16024 bytes
SHA-256: a86decd20207f7ae973b24d81b941b53cc99632d378591abc1873f23d72e54bc

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